[ubuntu] Canon iP7250 printer prints test page but nothing else

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http://ubuntuforums.org – I wonder if anyone can help me please? I have a Canon Pixma iP7250 wireless printer and an Asus RT-N56U router. I installed the printer wirelessly with pukka Canon drivers thanks to someone on this forum and it always prints a test page successfully, but it won't print from any other program. The print queue box says "not connected?". It must be connected as it prints a test page, so what have I done wrong? I'm running 13.04. Many thanks, as always. Edit: I discovered the printer's IP address from the router and installed it via that. It now prints from LO as well as the test page (Hardware)